This activity helps students to understand when to round fractions to 0, 1/2 or 1. By sliding a lever, students create visual models to represent fractions. Students decide whether the fractions are c...More: lessons, discussions, ratings, reviews,...

Learn about percent through burning a virtual forest. The activity allows the user to burn a stand of trees and then guess either the percent of trees burned or the number that actually burned.More: lessons, discussions, ratings, reviews,...

This material is based upon work supported by the
National Science Foundation under Grant DUE-0226284.
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National Science Foundation.